CVE-2020-11528: bit2spr 1992-06-07 has a stack-based buffer overflow (129-byte write) in conv_bitmap in bit2spr.c via a long l

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HIGH 7.5REMOTEDOWNGRADE

CVE-2020-11528 is a high-severity flaw (CVSS 7.5) affecting bit2spr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

bit2spr 1992-06-07 has a stack-based buffer overflow (129-byte write) in conv_bitmap in bit2spr.c via a long line in a bitmap file.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-787
Published	2020-04-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bit2spr project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-04 17:15 UTCPublished CVE record published
2026-06-17 02:50 UTCUpdated Record last modified

bit2spr project bit2spr DOWNGRADE

Affected: 1992-06-07

Fixed in: no fixed release known

Safe to downgrade to: a release before 1992-06-07

1. Check installed version

apt-cache policy bit2spr || rpm -q bit2spr || bit2spr --version

2. No fixed release: DOWNGRADE to a release before 1992-06-07 (Debian / Ubuntu)

apt-cache madison bit2spr sudo apt install bit2spr=<VERSION_BEFORE_1992-06-07> sudo apt-mark hold bit2spr

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list bit2spr sudo dnf downgrade bit2spr-<VERSION_BEFORE_1992-06-07> sudo dnf versionlock add bit2spr

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-11528?

bit2spr: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-11528 being exploited?

CVE-2020-11528 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-11528 affect?

CVE-2020-11528 affects bit2spr. Severity is high (CVSS 7.5). bit2spr 1992-06-07 has a stack-based buffer overflow (129-byte write) in conv_bitmap in bit2spr.c via a long line in a bitmap file.

How urgent is CVE-2020-11528?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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